Shut-off for oil-tanks.



.PATENTED APR. 2, 1907.

J-. B. CARR. SHUT-OFF FOR OILYTANKS. APPLIOATION FILED JULY 19, 1906.

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rm; NORRIS PETERS co., WASHINGTON, D. c

hereinafter referred to.

UNITED STATES PATENT OFFICE.

SHUT-OFF FOR OIL-TANKS.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed July 19.1906. Serial No. 326,876.

T0 017/ w/trim it near/y concern:

Be it known that I, JOHN B. CARR, a citizen of the United States,residing at Pemberville, in the county of Wood and State of Ohio, haveinvented a Shut-Off for Oil-Tanks,- of which the following is aspecification.

This invention is an improvement in oiltanks, and relates moreespecially to the provision of an automatic device adapted for thepurpose of shutting off the discharge-pipe when the surface level of theoil in the tank reaches a certain point.

The primary objects of the invention are to produce a strong and durableautomatic shut-off device which shall be reliable and positive in itsoperation and can be readilyand conveniently applied to the customarytype of oil-tank without alteration thereof.

Other objects and advantages of the invention will hereinafter appear inthe specification, and what I claim as novel in the particularconstruction and arrangement of parts constituting the invention will bespecifically set forth in the appended claim.

In the accompanying drawings, which form a part of this specification,Figure l is a side elevation illustrating the application of theinvention, the full lines showing the parts in their normal position todischarge the con tents of the oiltank, while the dotted lines show theautomatic device tripped to close the valve in the discharge-pipe. Fig.2 is a detail sectional view, enlarged, of a support Fig. 3 is a sideelevation showing a slight modification.

Like numerals of reference indicate like parts ,in all the views of thedrawings.

1 designates the oil-tank, 2 the dischargepipe, and 3 the valve locatedin said discharge-pipe, these parts being of the usual construction.

In carrying out my invention the squared outer end of the stem 4 of thevalve 8 has fitted thereon a lever 5, which is angular in shape toprovide the projecting arms or members 6 and 7, and said lever is soconnected to the valve-stem that when the valve is open the member 6will extend at an upward inclination, while the companion mem ber 7extends downwardly and rearwardly, as shown in full lines, Fig. 1. Thearm or member 6 is shaped at its upper end to engage a shoulder or catch8 at the outer end of a bent lever 9, the latter being adapted to holdthe valve in its open position and against the action of aclosing-spring, hereinafter described. The bent lever 9 is looselypivoted on a pintle 23 at the upper end of a fixture or support 10,adjustably secured on the discharge-pipe 2 between the tank and valve.The fixture 10 has a depending portion which terminates in a socket 11and eye 12, the socket receiving a bar 13, secured therein by frictionalengagement and constituting a buffer or stop throw of thevalve-operating lever 5.

The member 7 of the valve-operating lever 5 strikes the buffer 13 whenthe valve is turned to its closed position, and for the purpose ofturning the valve automatically from an open to a closed position whenthe said operating-lever is released from the trip-lever- 9 a spring 14is provided and connected to the end of the member 7 and to the eye 12of the fixture or support 10. For this purpose I may employ either thecoiled spring 14-. (shown in Fig. 1) or a plate-spring 15, as shown inFig. 3, in which latter instance the spring is supported in a loop 16 onthe fixture 10 and is connected at its ends by chains 17 to the member 7of the valve-operating lever, the connections of the chains 17 beingsuch that when the lever is thrown to the open position of the valve theplate-spring will be bowed or under tension sufficient to throw thelever to the closed position of the valve as soon as said lever isreleased. It will be understood, of course, that instead of a spring Imay employ its equivalent-as, for instance a weight, the application ofwhich will be readily apparent. d

From so much of the description it will be readily seen that when thevalve-operating lever 5 is turned to open'the valve and is engaged bythe trip-lever 9 the contents of the tank 1 will be discharged throughthe pipe'2 and that when said valve-operating lever is releasedbydisengaging the trip-lever therefrom the spring will"ac t to throw thevalveoperating lever and close the valve.

Of course the triplever may be operated manually; but in order toprovide for an automatic operation thereof when the surface level in theoil-tank reaches a certain point I provide a float 18 upon the body ofoil in the tank and connect the same by a chain or flexible connection19 to the outer end of the trip-lever 9, said chain passing for limitingthe over a guide-pulley 20, located at the upper edge of the tank. Thereis enough slack in the chain 19 so that the same will not operate on thetriplever until the level of the oil in 5 the tank reaches a certainpoint-in the present instance a point slightly above the discharge-pipe, as indicated in dotted lines in Fig. 1.

From the fore oin the o eration will be D D readlly understood, for asthe Oll 1s d1scharged through the discharge-pipe the float will followthe fall of oil in the tank, and

when the slack in the chain 19 has been taken up the weight of the floatwill pull upon the trip-lever and release the same from the valve-lever5, the latter being then tlnown by the spring to close the valve in thedischarge-pipe. hen the tank is to be again filled, the valve is openedand held by the trip-lever, so that the automatic operation may berepeated.

The fixture or adjustable support 10 is prefer ably made up of twoplates, Fig. 2, provided with half-round portions adapted to embrace thedischarge pipe 2 and bar or buffer 13, respectively, said plates beingclamped together on said parts by means of the bolts 21 and 22, asshown. The upper ends of the plates are cut away at their inner sides toreceive the lever 9, which is pivoted on the pintle 23. It will be seen,therefore, that the support or future 10 can be adjusted on thedischarge-pipe to properly locate the same with respect to the valve andits operating-lever, and of course the buffer-bar 13 can be adjusted inthe support so that the valve will be properly closed when the member 7of the lever is against the bufler.

As valves are usually provided with square-end stems, it is apparentthat the de I vices hereinbefore described can be readily l andconveniently applied to the customary j type of oil-tank.

' Having described my invention, what I claim as new, and desire tosecure by Letters j Patent, is-

j The combination with an oil-tank having a j discharge-pipe extendingtherefrom and projvided with a valve the stem of which is 1 squared atits outer end, of an angle-lever j provided centrally with a squareopening by l which it is applied to the squared end of the valve-stem soas to provide members at the opposite sides of the latter, asupportingbracket adapted to be clamped upon the discharge pipe andcomprising two similar plates and connecting-bolts, said platesembracing the discharge-pipe and forming a 1 tapered opening near thelower end of the bracket and a pair of ears at the upper end thereof, awedge-shaped butler-bar removably engaging the tapered opening of thebracket, a trip-lever pivoted between the ears at the upper end of thebracket and adapted to detachably engage one member of the jangle-lever, and a compression-spring connected to the other end of theangle-lever and to the supporting-bracket; together with a float locatedin the tank, a guide at the upper edge of the tank, and a flexibleconnection extending from the float over the guide and connected to thetrip-lever, as herein shown and described.

In testimony whereof I have signed my 1 name to this specification inthe presence of t two subscribing witnesses.

JOHN B. CARR. Witnesses:

j C. R. GERDING, l E. J. HERMAN.

l l l j

